Meat and cheese may be as bad for you as smoking

“Crucially, the researchers found that plant-based proteins, such as those from beans, did not seem to have the same mortality effects as animal proteins. Rates of cancer and death also did not seem to be affected by controlling for carbohydrate or fat consumption, suggesting that animal protein is the main culprit.”

 

140304125639-large

That chicken wing you’re eating could be as deadly as a cigarette. In a new study that tracked a large sample of adults for nearly two decades, researchers have found that eating a diet rich in animal proteins during middle age makes you four times more likely to die of cancer than someone with a low-protein diet — a mortality risk factor comparable to smoking.

“There’s a misconception that because we all eat, understanding nutrition is simple. But the question is not whether a certain diet allows you to do well for three days, but can it help you survive to be 100?” said corresponding author Valter Longo, the Edna M. Jones Professor of Biogerontology at the USC Davis School of Gerontology and director of the USC Longevity Institute.

Not only is excessive protein consumption linked to a dramatic rise in cancer mortality, but middle-aged people who eat lots of proteins from animal sources — including meat, milk and cheese — are also more susceptible to early death in general, reveals the study to be published March 4 in Cell Metabolism. Protein-lovers were 74 percent more likely to die of any cause within the study period than their more low-protein counterparts. They were also several times more likely to die of DIABETES.

But how much protein we should eat has long been a controversial topic — muddled by the popularity of protein-heavy DIETS such as Paleo and Atkins. Before this study, researchers had never shown a definitive correlation between high protein consumption and mortality risk.

Rather than look at adulthood as one monolithic phase of life, as other researchers have done, the latest study considers how biology changes as we age, and how decisions in middle life may play out across the human lifespan.

In other words, what’s good for you at one age may be damaging at another. Protein controls the growth hormone IGF-I, which helps our bodies grow but has been linked to cancer susceptibility. Levels of IGF-I drop off dramatically after age 65, leading to potential frailty and muscle loss. The study shows that while high protein intake during middle age is very harmful, it is protective for older adults: those over 65 who ate a moderate- or HIGH-PROTEIN diet were less susceptible to disease.

The latest paper draws from Longo’s past research on IGF-I, including on an Ecuadorian cohort that seemed to have little cancer or DIABETES susceptibility because of a genetic mutation that lowered levels of IGF-I; the members of the cohort were all less than five-feet tall.

“The research shows that a low-protein diet in middle age is useful for preventing cancer and overall mortality, through a process that involves regulating IGF-I and possibly insulin levels,” said co-author Eileen Crimmins, the AARP Chair in Gerontology at USC. “However, we also propose that at older ages, it may be important to avoid a low-protein diet to allow the maintenance of healthy weight and protection from frailty.”

Crucially, the researchers found that plant-based proteins, such as those from beans, did not seem to have the same mortality effects as animal proteins. Rates of cancer and death also did not seem to be affected by controlling for carbohydrate or fat consumption, suggesting that animal protein is the main culprit.

“The majority of Americans are eating about twice as much proteins as they should, and it seems that the best change would be to lower the daily intake of all proteins but especially animal-derived proteins,” Longo said. “But don’t get extreme in cutting out protein; you can go from protected to malnourished very quickly.”

Longo’s findings support recommendations from several leading health agencies to consume about 0.8 grams of protein per kilogram of body weight every day in middle age. For example, a 130-pound person should eat about 45-50 grams of protein a day, with preference for those derived from plants such as legumes, Longo explains.

The researchers define a “HIGH-PROTEIN” diet as deriving at least 20 percent of CALORIES from protein, including both plant-based and animal-based protein. A “moderate” protein diet includes 10-19 percent of calories from protein, and a “low-protein” diet includes less than 10 percent protein.

Even moderate amounts of protein had detrimental effects during middle age, the researchers found. Across all 6,318 adults over the age of 50 in the study, average protein intake was about 16 percent of total daily calories with about two-thirds from animal protein — corresponding to data about national protein consumption. The study sample was representative across ethnicity, education and health background.

People who ate a moderate amount of protein were still three times more likely to die of cancer than those who ate a low-protein DIET in middle age, the study shows. Overall, even the small change of decreasing protein intake from moderate levels to low levels reduced likelihood of early death by 21 percent.

For a randomly selected smaller portion of the sample – 2,253 people – levels of the growth hormone IGF-I were recorded directly. The results show that for every 10 ng/ml increase in IGF-I, those on a HIGH-PROTEIN diet were 9 percent more likely to die from cancer than those on a low-protein diet, in line with past research associating IGF-I levels to cancer risk.

The researchers also extended their findings about HIGH-PROTEIN diets and mortality risk, looking at causality in mice and cellular models. In a study of tumor rates and progression among mice, the researchers show lower cancer incidence and 45 percent smaller average tumor size among mice on a low-protein diet than those on a high-protein diet by the end of the two-month experiment.

“Almost everyone is going to have a cancer cell or pre-cancer cell in them at some point. The question is: Does it progress?” Longo said. “Turns out one of the major factors in determining if it does is is protein intake.”

 

Source: http://www.sciencedaily.com/releases/2014/03/140304125639.htm

Advertisements

What the Future of Food Could Look Like…

One of the largest matters of concern surrounding the issue of climate change (or at least it SHOULD be the largest concern) is what will happen to our global food supply if we carry on business as usual. It has been said many times, right here on OGP, that the fight against climate change begins on your plate. While this is known to be true by many reputable scientists, researchers, and governmental bodies, there is still an outrageous disconnect between the facts and the action that is being taken.

What I am referring to here is the wildly wasteful system of industrialized agriculture that we have in the U.S. and that can be found in countries across the world as well. Driven by an insatiable demand for meat, our entire food system – I’m talking globally here – has been warped beyond any recognizable measure to meet the needs of the meat industry.

The result? A lot of cheap meat, a lot of food being produced to feed that “meat,” and then all the not so great environmental, animal, and human consequences. So in the most ironic of twists, in the pursuit of feeding people, the industrial food complex may be the very thing that causes the massive collapse of major food systems.

Let’s Break This Down

According to the IPCC’s climate report, 40 percent of the Earth’s land surface is being managed for cropland and pasture. That is an incredible area of land all relegated for food production. But the proportion of food produced and food consumed is way out of balance. In the U.S., only 20 percentof the corn grown across 80 MILLION acres of cropland goes to feeding people. The rest is largely portioned off to feed livestock.

It has been estimated that the U.S. could feed 800 million people with the grains that they use to feed livestock. And this is a quickly becoming a global trend as 40 percent of the world’s grain goes to feeding livestock as well. In addition, the demand for corn to feed livestock has lead to the expansion of corn monocultures which are highly susceptible to collapse given an unexpected change in weather or disease.

According to the FAO, in 2007, 270 million tons of meat were produced across the world, every year this number increases by 2.3 percent, meaning by 2014 that number has increased by a significant margin. The energy ratio of the amount of fossil fuel to protein produced for beef is a whopping 54:1. A half a pound of steak contains around 77 grams of protein. Yum, fossil fuels.

Globally, livestock production is responsible for 80 percent of the world’s total methane emissions from agriculture.

As greenhouse gas emissions increase along with an increase of livestock production (as predicted by the FAO’s 2.3 percent per year) carbon dioxide concentrations rise, the IPCC predicts, that crops will flourish. However, the downside is, the additional CO2 comes with an increase in temperature, which over the long-term actually hinders plant growth. In addition, higher temperatures make droughts more common and more severe, making necessary irrigation nearly impossible.

The Two Options for Our Food Future

By now, the picture is pretty clear, if we continue to prioritize meat production over the production of other plant-based proteins then the future of global food supplies is not bright…to say the least.

The alternative, however, does not require new innovative technology but rather is a return to our agriculture roots, so to speak. The sustainable agriculture movement is based around the concepts of ethical and responsible farming, utilizing methods that were relied on for years before the first “concentrated feeding facility” was even created.

Organizations such as Sustainable Table and Slow Food offer an alternative to our current system of industrialized agriculture that if adopted world-wide could greatly mitigate the environmental damage caused by industrialized husbandry.

Using simple methods such as multi-cropping fields to reduce the demands for pesticides and fertilizer and planting a diverse variety of crops, sustainable agriculture is not driven by the demand to feed livestock that will one day become meat, it is driven by the intention of managing the Earth to feed to many people who probably intend on eating for the next thousand or so years…

We have put our food system on a track that is inherently self-destructive. By taking a step back and putting the nature back in agriculture we can create a flourishing food system that will be able to withstand the inevitable “surprises” posed by climate change.

Now, this change won’t happen over night, but you can take real steps to see this happen right now. First and foremost, of course, cutting meat out of your diet is a powerful way to remove your personal burden on animals and the environment. Second, take yourself out of the industrial food complex, try more raw foods, don’t buy produce that has been shipped across the world, and as a rule: don’t eat it if it didn’t come out of the ground. Consumer power is more important than you may think, change your habits and change the world – simple as that!

Source: http://www.onegreenplanet.org/animalsandnature/what-the-future-of-food-could-look-like-spoiler-its-not-great/